Portion of a golf club head for a putter



FIG. 1 is a top view of a portion of a golf club head for a putter showing our new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a rear view thereof; and,

FIG. 5 is a perspective view thereof.

The broken line showing immediately adjacent the shaded portion forms an unclaimed boundary of the design. The broken line showing of the elongated linear regions and the unshaded areas therein and the remainder of the golf club head for a putter form no part of the claimed design. 

The ornamental design for a portion of a golf club head for a putter, as shown and described. 